Critically, the developers of PoE also provide hosting for the wiki pro-bono. The service is so beneficial for players I imagine they figured the game would benefit from an ad-free (and therefore more usable) community wiki. Personally I have recently started seeing the correct wiki at the top of searches so I think the SEO battle is winnable with community effort. It helps that Fandom wikis are uniquely unusable without an ad blocker running.